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Logo of nihpaAbout Author manuscriptsSubmit a manuscriptHHS Public Access; Author Manuscript; Accepted for publication in peer reviewed journal;
 
From:
Fertil Steril. Author manuscript; available in PMC 2013 July 1.
Published in final edited form as:
Fertil Steril. 2012 July; 98(1): 109–116.
Published online 2012 May 16. doi: 10.1016/j.fertnstert.2012.04.012

Table 4

Body mass index and weight change in relation to positive β-hCG, clinical pregnancy and live birth rates, (n = 170 women, 226 cycles).

Positive β-hCGClinical
Pregnancy
Live birth
NAdjusteda Rate
(95% CI)
Adjusteda Rate
(95% CI)
Adjusteda Rate
(95% CI)
Baseline BMI, kg/m2
     <203057 (36, 75)41 (23, 62)39 (20, 62)
     20 – 22.46266 (50, 78)50 (35, 65)42 (28, 58)
     22.5 – 24.95144 (28, 61)c33 (20, 48)30 (17, 47)
     25 – 29.94656 (39, 72)34 (22, 48)23 (12, 40)c
     ≥303741 (24, 61)c29 (15, 49)22 (11, 41)
     P, trendb0.130.090.03
Weight change, kg
     <−33957 (33, 78)23 (10, 43)16 (5, 38)
     −1 to −33248 (29, 69)37 (21, 57)28 (12, 54)
     −1 to 17752 (39, 66)43 (30, 57)37 (24, 53)
     1 to 34965 (48, 79)49 (37, 64)44 (30, 60)
     >33056 (33, 76)38 (17, 64)26 (11, 50)
     P, trendb0.580.090.12
aAdjusted for age, day 3 FSH levels, infertility diagnosis and treatment protocol. Models for weight change are further adjusted for baseline BMI
bFrom a separate regression model where categories of BMI or weight change were modeled as a continuous variable.
cSignificantly different from women with a BMI between 20 and 22.4 kg/m2 (p<0.05)